The film is based on the personal accounts of retired New York police officer Ralph Sarchie, as detailed in his book “Beware the Night”

What do you get when a New York police officer and a priest investigate a series of disturbing crimes? In Screen Gems’ “Deliver Us From Evil” you get absolute terror, as demonic possessions terrorize the city. But is it really demonic possession or just the darkest side of human nature?

Eric Bana takes on the role of Ralph Sarchie in the film that’s based on Sarchie’s book “Beware the Night,” which he co-wrote with Lisa Collier Cool. The book and film are about Sarchie’s supposed real-life experiences after he met a renegade priest, played by Edgar Ramirez, who was convinced that a case involved demons.

Despite his own faith issues, Sarchie wound up believing the priest, Mendoza, as one strange case became many. Regardless of your personal take on the authenticity of Sarchie’s story, the film definitely establishes a dark horror tone, and at least toys with the possibility of true demonic presence.

It’s not completely clear, based on what’s been released so far, if the film goes fully into the supernatural elements of Sarchie’s story, but it certainly hints at it aggressively, at the least.

The first clip released opens on a classic horror film trope, with Sarchie’s daughter playing with her jack-in-the-box. It’s an expansion of a scene teased in the film’s official trailer, with the girl stopping as she starts to hear scratching under her floor, and then screaming for her mother, played by Olivia Munn, when she can’t open her door.